Pump.



PATPNTBD SEPT. 4, 1906. W. A. MITCHELL.

PUMP.

APPLIOATIQN FILED 1'AY11,1904.

Unirse sterne l vSIXTY ONE-HUNDRE AIKEN, SOUTH CAROLNA,

in. semen.

D'lHS TO Gr, L. 'POULE Specification of Letters Fatent.

.etented Sept. ifi, 1965.

. Application filed May ll. 1904. Serial No. 207,484,

.and of little value.

The invention utilizes n suitable pump which supplies e luid-pressure medium for forcing the liquid upward and creates a vecuum which dra-Ws the liquid into the welli tubing preparatory to its elevation.

is to be lied to the` following For e, iu l description of the invention and the merits thereof and also to require e knowledge of the detailsv of construction ol the means for effecting the result reference description and nocompnnying` (lrewing.

While the invention may be adapted to different forms and conditions by changes in the structure and minor details without (iepzirtinv from the spirit or essentiel tentures thereo still the preferred embodiment tl1ereof shown in the occoinpnnying drawing, in wl1icii- The figure of tile drawing is e, sectional view' showing the ap1i licetion ol' the invention.

Corresponding` and like parte are referred to in the following description and indicate(` in the drawing by the seine reference cintracters.

Specifically describing the invention ne illustrated, the letter M designates the wellh tu hing which consti tutes the pumplonrrel in tlie embodiment of tiie invention. The tubing1 lil leeds nt its upper end to any sui table outlet l'or the liquid -wliicli is elevated in the Worlqi u; ol' the de vice. At the lower oncl poo tion of the tubing M is provided o vvnlvezl piirtition N, n llnxiwvnlve lo ol tlie ordinory type boing" shown hinged to snidpnrtition, seiii vulve being' nolnpted to open upwardly. lt will `be noted il the tube if 'is provided et its upper end w' fb. :in elbow, nucl :i Huid-pressurorpipe l? lends through terminating ndj-:teent the n stiiliing-box G, clniniber J unil pip n iittecl to this elbow, extending downwardly :lerne l sind the elizunber J nie in the tu ping lifl and Aoppositeeiuls ol: tlie ey lower extremity of the letter. of the pipe l1 is provided with e inurl-cheniber J, tlie latter being oi' n larger diameter than tliepipe F,- 'For purposes which will tppeer hereinafter. The olizmiber J oonsists of :i cylinder or easing open et s lower 'enti sind closed et its upper end., the pipe F leerling into the Chamber J et the upper lul thereof having linee-(lori connection :it this point. Above tbe upper end of the eliziinber il' is provided e second partition O, tire lauter lowing' n Valve-ent U upon which :i cheek-vulve iiiV is `liciepted to close or see-t itself. ille eliecltvalve H ,is peculiarly mounted, leringv provided with n control opening wint-li receives the lower end portion of the pipe l?, the letter forming n guide which insures nccurute seno ing of the valve H in e nuinner clearly epparent. The xiif.i'l1ntii1g of the vulve lil is nfl 'Elie lower nd vantegeous because of its simplicity in ovoidh ine' use of ports which likely to become out of order in the use olf the device. 'The upper enfl of the pipe i" lends oli to tlie pump by wliicli tlie nir or l'luill pressure is supplied to the oluiiuber '.llie pump is comprised of' n eylincler D, in wliirli opere tes :L piston C, natura-ted by t pision-roll .lie pistone-oil A extends from one end of 'the eyliuder l), a suitable pecking-box B being provilleclnt this `end in the usuel uninner. At

li (loinesil und E2, the pist moving between said domes. The ilonies il D are loezitedon C operating orr preferably and E2 communicate it one end with time cylinder D, sind the pipe l" oi the well before described leeds into tlie other ond ol' the deine E. The dome l;2 is ordinarily siolilnrlyc'om nected witli n second well.

ln practice the dooie iii is *filled with ai liquiil, suoi-l ns water, when the piston C is nl. the limit of its movement toward the end of the cvlinfler D, provided Willi the snif-' -floine lil". pou the movement of the pistou in the op` besito ection waiter Hows from 2 E into cL initier D, leaving; en' :ur-s we ir iloine lil belnml it` il dooie il" is et leest epinal in capacity to oylinder l), will ein" s be toll olf ,vntei oi.

Thus by ifeeiprocetion of the piston u i.

elternotolv compi soil mu iureliell in 'the l. 'ille lluneiwns of le 'only to provide adequate space/one for piston, lthe other for.the required volume of air, -which must be so confined as not to be carriedoff with the water pumped.

When only one well is to be operated, dom

E2 is filled with a liquid, such as lubricating, oil, and the small pipe which enters said dome E2 is plugged'or otherwise closed at some distance from the said dome, thereby admitting of the pressure of the air, materially assisting in the return of the piston C to a normal position, thus preventing a heavy vpulsation on the driving power.

The following may be mentioned as some of .the advantages resulting. from ,the peculiar structure: A soft expansion and contraction of the air in the chamber J and pipe F prevents beatin the valves in a way to soon render them un it for effective service. The piston C can travel a short distance with slow speed and with but little friction while the air-piston in the chamber J is traveling a long distance at high speed and giving the cubic feet of water.

The range of usefulness of the mechanism is ma'terially increased because the wear and tear incident to the pounding of valves is ob dated. f

Having thusdescribed the invention, what is claime as new isy l. In means for elevating liquids, the combinatiionof well-tubing provided adjacent its -lower end with a suitable check-valve, a pump, .a fluid-pressure pipe leading into the tubing and terminating above the checkvailve aforesaid, a fluid-pressure chamber at the lower end of the fluid-pressure pipe and comprising a casing spaced from the sides of the tubing, a partition above the fluidva'lve chamberand rovded with a valveseat, a check-valve a a ted to open'upward from Ithe last-mentione partition and mounted upon the fluid-pressure pipe aforesaid.

2. In means for elevating liquids, the combination of well-tubing provided adjacent its lower end with a suitable check-valve, a pump, a fluid-pressure pipe leading into the tubing and terminating above the checkvalveaforesaid, a fluid-pressure chamber at'Y pipe, 'said chamber being closed at its upper,V

end and open at its lower end and a valved partition in the well-tube at a point above the lower open end of the fluid-pressure chamber. v

4. In means for elevating liquids, the combination of a well-tube or the like, a checkvalve at the lower end portion of said tube, a valved partition disposed above said checkvalve, a fluid-pressure pipe leading into the well-tube, a fluid-pressure chamber at the lower end of said' pipe and interposed between the checkvalye and the valved partition aforesaid, and 7a pump, said pump embodying anengine-cylinder, domes at opposite ends of said cylinder, one of said. domes being connected with the fluid-pressure pipe, and a piston operating between the domes.

WILLEY A. MITCHELL.

Witnesses:

G. L. Toorn,

JASON W. WooDwARD. 

